中文摘要：

在双基合成孔径雷达（synthetic aperture radar,SAR）中两个独立的频率源相位噪声直接叠加在一起,严重影响系统的成像质量。根据频率源相位噪声的二阶统计特性,定量分析了频率源相位噪声对双基SAR图像偏移、聚焦精度以及积分旁瓣比等参数的影响,导出了不同波段下频率源相位噪声对双基合成孔径雷达成像系统相干积累时间的限制。研究结果进一步完善了双基SAR成像理论体系,为系统的设计提供了理论依据。

英文摘要：

The impact of frequency source noise on bistatic synthetic aperture radar（SAR） is presented.Two independent oscillator phase noises will be superimposed directly in bistatic SAR,which may cause a time-variant shift,spurious sidelobes,as well as a defocusing of image.Quantitative estimates are derived analytically and requirement for coherent accumulated time is deduced based on the second-order statistics characteristic of oscillator phase noise.The research results consummate the bistatic SAR imaging theory system and provide theory basis for the system design.